Safety is a constant need that involves aspects such as integrity of moving objects and / or transport, such as lockers or bike. Therefore, in this paper the development of software applications based on image processing, which relieve traditional media such as padlocks and associated problems such as lost keys or forgotten passwords arises. In a timely recognition of faces in an embedded to derive a signal activation or deactivation that triggers an electronic lock, in order to establish the algorithms and processing times required to further develop an application cell that act as portable hardware key is used.